﻿using Liang.Resource;
using System;
using System.Collections.Generic;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace Liang.UI
{
    public class OutlookBar : Panel
    {
        private int buttonHeight;
        private int selectedBand;
        private int selectedBandHeight;

        public int ButtonHeight
        {
            get
            {
                return buttonHeight;
            }

            set
            {
                buttonHeight = value;
            }
        }

        public int SelectedBand
        {
            get
            {
                return selectedBand;
            }
            set
            {
                SelectBand(value);
            }
        }

        public OutlookBar()
        {
            buttonHeight = 40;
            selectedBand = 0;
            selectedBandHeight = 0;
        }

        public void Initialize()
        {
            //parent Panel 必须存在不能删除
            this.BorderStyle = BorderStyle.None;
            Parent.SizeChanged += new EventHandler(SizeChangedEvent);
        }

        public void AddBand(string caption, ContentPanel content, string assembly, string imgUrl)
        {
            content.outlookBar = this;
            int index = Controls.Count;
            BandTagInfo bti = new BandTagInfo(this, index);
            BandPanel bandPanel = new BandPanel(caption, content, bti, assembly, imgUrl);
            Controls.Add(bandPanel);
            UpdateBarInfo();
            RecalcLayout(bandPanel, index);
        }

        public void SelectBand(int index)
        {
            selectedBand = index;
            RedrawBands();
        }

        private void RedrawBands()
        {
            for (int i = 0; i < Controls.Count; i++)
            {
                BandPanel bp = Controls[i] as BandPanel;
                RecalcLayout(bp, i);
            }
        }

        private void UpdateBarInfo()
        {
            selectedBandHeight = ClientRectangle.Height - (Controls.Count * buttonHeight)-10;
        }

        private void RecalcLayout(BandPanel bandPanel, int index)
        {
            buttonHeight = 40;
            int vPos = (index <= selectedBand) ? buttonHeight * index : buttonHeight * index + selectedBandHeight;
            int height = selectedBand == index ? selectedBandHeight + buttonHeight : buttonHeight;

            // the band dimensions
            bandPanel.Location = new Point(0, vPos);
            bandPanel.Size = new Size(ClientRectangle.Width, height);

            // the contained button dimensions
            bandPanel.Controls[0].Location = new Point(0, 0);
            bandPanel.Controls[0].Size = new Size(ClientRectangle.Width, 40);

            // the contained content panel dimensions
            bandPanel.Controls[1].Location = new Point(0, 30);
            bandPanel.Controls[1].Size = new Size(ClientRectangle.Width - 2, height -30);
        }

        private void SizeChangedEvent(object sender, EventArgs e)
        {
            Size = new Size(Size.Width, ((Control)sender).ClientRectangle.Size.Height);
            UpdateBarInfo();
            RedrawBands();
        }
    }

    internal class BandTagInfo
    {
        public OutlookBar outlookBar;
        public int index;

        public BandTagInfo(OutlookBar ob, int index)
        {
            outlookBar = ob;
            this.index = index;
        }
    }

    internal class BandPanel : Panel
    {
        public BandPanel(string caption, ContentPanel content, BandTagInfo bti, string assembly, string imgUrl)
        {
            BandButton bandButton = new BandButton(caption, bti, assembly, imgUrl);
            Controls.Add(bandButton);
            Controls.Add(content);
        }
    }

    internal class BandButton : ButtonEx
    {
        private BandTagInfo bti;

        public BandButton(string caption, BandTagInfo bti, string assembly, string imgUrl)
        {
            Text = caption;
            FlatStyle = FlatStyle.Flat;
            TextAlign = ContentAlignment.MiddleLeft;
            Image = AssemblyHelper.GetImage(assembly, imgUrl);            
            ImageAlign = ContentAlignment.MiddleLeft;
            TextImageRelation = TextImageRelation.ImageBeforeText;
            Visible = true;
            this.bti = bti;
            Click += new EventHandler(SelectBand);
        }

        private void SelectBand(object sender, EventArgs e)
        {
            bti.outlookBar.SelectBand(bti.index);
            //((BandButton)sender).Text = "-" + ((BandButton)sender).Text;
            //if (bti.outlookBar.SelectedBand == ((BandButton)sender).bti.index)
            //   {
            //       MessageBox.Show(sender.ToString());
            //   }
        }
    }

    public abstract class ContentPanel : Panel
    {
        public OutlookBar outlookBar;

        public ContentPanel()
        {
            Visible = true;
        }
    }

    public class IconPanel : ContentPanel
    {
        protected int iconSpacing;
        protected int margin;

        public int IconSpacing
        {
            get
            {
                return iconSpacing;
            }
        }

        public int Margins
        {
            get
            {
                return margin;
            }
        }

        public IconPanel()
        {
            margin = 20;
            //这里是调节图标间距的
            iconSpacing = 80 + 10;    // icon height + 18+ text height + margin
            BackColor = Color.White;
            AutoScroll = true;
        }




        public void AddIcon(string caption, Image image, object obj, EventHandler onClickEvent)
        {
            int index = Controls.Count / 2;
            PanelIcon panelIcon = new PanelIcon(this, image, obj,index, onClickEvent);
            Controls.Add(panelIcon);
            Label label = new Label();
            label.Text = caption;
            label.Visible = false;
            label.Location = new Point(0, margin + 60 + index * iconSpacing + 5);
            label.Size = new Size(Size.Width, 18);
            label.TextAlign = ContentAlignment.BottomCenter;
            label.Cursor = Cursors.Hand;
            label.Click += onClickEvent;
            label.Tag = panelIcon;
            Controls.Add(label);
        }
    }

    public class PanelIcon : PictureBox
    {
        public int index;
        public IconPanel iconPanel;

        private Color bckgColor;
        private bool mouseEnter;

        private object obj;

        public object Obj
        {
            set { obj = value; }
            get
            {
                return obj;
            }
        }

        public int Index
        {
            get
            {
                return index;
            }
        }

        public PanelIcon(IconPanel parent, Image image,object obj,int index, EventHandler onClickEvent)
        {
            this.index = index;
            this.iconPanel = parent;
            this.obj = obj;
            Image = image;
            Cursor = Cursors.Hand;
            Visible = true;
            Location = new Point(iconPanel.outlookBar.Size.Width / 2 - 80 / 2,
                            iconPanel.Margins + index * iconPanel.IconSpacing);
            Width = 80;
            Height = 80;

            SizeMode = PictureBoxSizeMode.StretchImage;
            Click += onClickEvent;
            Tag = this;

            MouseEnter += new EventHandler(OnMouseEnter);
            MouseLeave += new EventHandler(OnMouseLeave);
            MouseMove += new MouseEventHandler(OnMouseMove);

            bckgColor = iconPanel.BackColor;
            mouseEnter = false;
        }

        private void OnMouseMove(object sender, MouseEventArgs args)
        {
            if ((args.X < Size.Width - 2) &&
                (args.Y < Size.Width - 2) &&
                (!mouseEnter))
            {
                BackColor = Color.LightCyan;
               // BorderStyle = BorderStyle.FixedSingle;
                Location = Location - new Size(1, 1);
                mouseEnter = true;
            }
        }

        private void OnMouseEnter(object sender, EventArgs e)
        {
        }

        private void OnMouseLeave(object sender, EventArgs e)
        {
            if (mouseEnter)
            {
                BackColor = bckgColor;
              //  BorderStyle = BorderStyle.Fixed3D;
                Location = Location + new Size(1, 1);
                mouseEnter = false;
            }
        }
    }



}
